4-20ma Current Signal Detection Control Relay Switch Setting Upper and Lower Limit Alarm Module RS485
4-20mA OUT OF RANGE TRIP AMP RELAY | Foxtam Controls (en-GB)
Solid state relay, ssr, and scr relays.
relay - Switch on a 10 A circuit with only a 20 mA signal - Electrical Engineering Stack Exchange
4-20ma Display Meter With 4 Ways Relay And Dc24v Voltage Output Din Water Liquid Level Pressure Temperature .etc. Controller - Pressure Monitors - AliExpress
DC-Limit Value Switch Type STW1000V2 - ZIEHL industrie-elektronik GmbH + Co KG
GWA-250-U0 - Limit value switch - ACS-CONTROL-SYSTEM
4- 20 mA Single Phase Solid State Relays
FULRD FH3100LV 4-20mA 100A Industrial Solid State Relay Voltage Regulator | eBay
Online PH/ ORP Transmitter With RS485 Two Relays Two 0/4~20mA Output For Sewage